Direct vs Indirect Diesel Heater: Which Do You Need?

ZB-H100 heater product view for the direct vs indirect diesel heater specification guide

A direct vs indirect diesel heater inquiry needs model-specific documentation for both offers. This guide records the published diesel kerosene fields and gives you questions to request construction, installation and outlet-air details. The indirect category has model specifications On request, so ask for a sheet before making a comparison.

Request construction details for both offers

What does each manual say about the combustion chamber, air path and exhaust arrangement? Is ducting listed for the exact proposed model? What supplied components and installation drawings accompany the quotation? Ask these questions for each offer, with the model code in the answer, before putting construction descriptions into a comparison table.

Use an open column for the indirect offer

The published diesel models provide output, tank, consumption, supply and weight fields. For an indirect offer, request those same entries in its own column. Ask for heating-volume or area units and the rating conditions. Leave missing values On request until a model sheet is supplied; do not fill the column from a different heater.

Review the application with the manual

What installation location is being proposed? Which outlet-air requirements, ducting details and operating instructions must the supplier address? Who will review the ventilation and clearance questions? Send the same project description with both offers and ask for written model-specific answers before a purchasing decision is recorded.

Listed model-field comparison

Use the table to record the entries published for each named model. Copy a value with its unit and qualifier. Fields marked On request need confirmation for that code. Keep output settings, fuel consumption, heating volume / area and supply entries in their own rows when preparing a comparison.

Published fields for the named ZOBO models
Model	Heat output	Fuel	Power supply	Fuel tank / cylinder	Fuel consumption	Heating volume / area	Airflow	Ignition / control	Product size	Net / gross weight
ZB-H100	30 kW (100,000 BTU)	Kerosene, diesel	110V / 60Hz, 220V / 50Hz	50 L	2.9 L/h	480 m³	On request	Continuous spark ignition; thermostat	1100 × 550 × 600 mm	30.5 / 33.6 kg
ZB-K175	51 kW (175,000 BTU)	Kerosene, diesel	110V / 60Hz, 220V / 50Hz	50 L	4.8 L/h	1,020 m³	On request	Continuous spark ignition; thermostat	1060 × 540 × 575 mm	22.3 / 25.8 kg
PLUS K180	51 kW	Kerosene, diesel	110V / 60Hz, 220V / 50Hz	50 L	4.8 L/h	1,060 m³	On request	Continuous spark ignition; thermostat	1130 × 560 × 735 mm	25.6 / 28 kg
ZB-K350	100 kW	Kerosene, diesel	220V / 50Hz	70 L	9.8 L/h	2,000 m³	On request	Continuous spark ignition; thermostat	1310 × 500 × 750 mm	52 / 56.5 kg

Questions for the shortlisted models

ZB-H100

The fuel row names kerosene and diesel. Which one are you requesting? Ask for the corresponding fuel-grade and filling instructions in the manual. If your quotation needs a runtime entry, request a documented figure for this model. What conditions accompany it, and which operating instructions should your reviewer check?

ZB-K175

Which supply version should your inquiry name? The record lists two voltage / frequency entries. Ask for the version you want and the connection instructions that accompany it. For the continuous spark ignition and thermostat entries, which manual pages explain the controls? Include any outstanding control questions with this model code.

PLUS K180

Ask for the manual describing the listed ignition and thermostat. What control instructions should accompany the proposed order? If you need shipping information, identify whether your question concerns the unit or its package. Which net and gross figures belong on your receiving documents, and what packaging details need order-specific confirmation?

ZB-K350

The heating entry uses a volume unit. What rating conditions accompany that figure? Ask your reviewer what project information to send with the model code. Keep any proposed application as a question in the inquiry. Which placement, ventilation and clearance instructions must be checked in the model manual before completing your selection?

Build the quotation worksheet

Make one column for each exact model code. Start with the values in the comparison table, then add a column for supplier answers. Keep the quotation quantity, requested documentation and delivery details together. When a required entry is On request, name that field in the inquiry so the answer can be placed beside the correct model.

You can ask for the output entry as printed, the voltage and frequency, the listed fuel and the dimensions. If several settings appear in the heat row, copy the full row. Don't turn a fuel-consumption range into a runtime entry. Ask for the conditions associated with each figure and any missing operating information in the manual.

Buyer confirmation checklist

Have you identified the model code in every request for a missing field?
Which voltage and frequency should be confirmed on the quotation?
Have you preserved the units for output, consumption, airflow and heating volume / area?
What rating conditions does the supplier document for the proposed model?
Which fuel grades, supplied components and connection details does the manual specify?
What installation, ventilation, clearance and inspection instructions must be reviewed?
Who will approve the proposed application and operating arrangement?
Which dimensions, weights, package entries and loading figures need order-specific confirmation?

Open Diesel Kerosene Heaters for the next part of your inquiry. What do you still need to ask about the proposed unit? Add that question to your worksheet and request the relevant documentation with your quote.

Open Indirect Diesel Heaters for the next part of your inquiry. What do you still need to ask about the proposed unit? Add that question to your worksheet and request the relevant documentation with your quote.

Open Construction Site Heating: How to Choose a Construction Heater for the next part of your inquiry. What do you still need to ask about the proposed unit? Add that question to your worksheet and request the relevant documentation with your quote.

Open How to Size an Industrial Heater for the next part of your inquiry. What do you still need to ask about the proposed unit? Add that question to your worksheet and request the relevant documentation with your quote.

Open Diesel vs Kerosene: Which Fuel for a Forced Air Heater? for the next part of your inquiry. What do you still need to ask about the proposed unit? Add that question to your worksheet and request the relevant documentation with your quote.

Open Torpedo Heater Safety: Ventilation, Placement and Refueling for the next part of your inquiry. What do you still need to ask about the proposed unit? Add that question to your worksheet and request the relevant documentation with your quote.

Questions to close before ordering

What should accompany the model code?

Send the quantity, the listed fields you are comparing and the entries that need confirmation. Include the project requirements you want reviewed and ask for the model sheet and manual with the supplier's answer.

How should missing fields be recorded?

Leave them On request. Don't copy a value from a neighboring model. Ask for an answer for the exact code and keep the supplied units and qualifiers when updating the worksheet.

Can a rating settle the installation questions?

Ask for the conditions accompanying the rating and the installation instructions for the proposed model. You'll need those documents in the review of your intended application; keep them with the specification request and the site reviewer's questions.

Official references

For general reference reading, review the agency documents below. Which parts apply to the proposed equipment and site? Ask the responsible reviewer to check their scope alongside the exact model manual. These references provide general context; ZOBO model values are the listed fields in the comparison above.